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#!/usr/bin/env python3
# Copyright (c) 2021 Graphiant, Inc.
import unittest
import scapy.compat
from scapy.layers.inet import IP, UDP
from scapy.layers.l2 import Ether
from scapy.packet import Raw
from framework import VppTestCase, VppTestRunner
from vpp_papi import VppEnum
from vpp_policer import VppPolicer, PolicerAction
NUM_PKTS = 67
class TestPolicerInput(VppTestCase):
""" Policer on an input interface """
def setUp(self):
super(TestPolicerInput, self).setUp()
self.create_pg_interfaces(range(2))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip4()
i.resolve_arp()
self.pkt = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
def tearDown(self):
for i in self.pg_interfaces:
i.unconfig_ip4()
i.admin_down()
super(TestPolicerInput, self).tearDown()
def test_policer_input(self):
action_tx = PolicerAction(
VppEnum.vl_api_sse2_qos_action_type_t.SSE2_QOS_ACTION_API_TRANSMIT,
0)
policer = VppPolicer(self, "pol1", 80, 0, 1000, 0,
conform_action=action_tx,
exceed_action=action_tx,
violate_action=action_tx)
policer.add_vpp_config()
# Start policing on pg0
policer.apply_vpp_config(self.pg0.sw_if_index, True)
rx = self.send_and_expect(self.pg0, self.pkt * NUM_PKTS, self.pg1)
stats = policer.get_stats()
# Single rate, 2 colour policer - expect conform, violate but no exceed
self.assertGreater(stats['conform_packets'], 0)
self.assertEqual(stats['exceed_packets'], 0)
self.assertGreater(stats['violate_packets'], 0)
# Stop policing on pg0
policer.apply_vpp_config(self.pg0.sw_if_index, False)
rx = self.send_and_expect(self.pg0, self.pkt * NUM_PKTS, self.pg1)
statsnew = policer.get_stats()
# No new packets counted
self.assertEqual(stats, statsnew)
policer.remove_vpp_config()
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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